Phantasmal Killer

Phantasmal Killer is a rare Silent skill that makes your next Attack deal double damage for 2 Energy. This is one of the highest damage multipliers available in the game — doubling a Predator, Skewer, or Glass Knife creates a burst turn that can deal 40+ damage in a single attack. The setup cost of 2 Energy is significant, meaning you need a high-value attack ready to fire the following turn.

Phantasmal Killer shines in decks with high single-hit attacks where doubling creates a decisive one-shot. It's particularly potent with Skewer (X times double damage for each energy spent) or Eviscerate (triple-hit at double damage). The limitation is that it only affects one attack, so it rewards strategic sequencing — identify your strongest attack, play Phantasmal Killer the turn before, then devastate. Upgraded, it applies to all attacks that turn instead of just one, opening up full turn damage amplification.